Review on AQQA 6-in-1 Electric Aquarium Gravel Cleaner and Vacuum - Automatic Fish Tank Cleaning Tools, suitable for Water Change, Sand Washing, Filter Maintenance, and Circulation (320GPH, 20W) by David Bone

It is far superior to other electric gravel cleaners on the market. Other vacuums use a bag with tiny holes that affect suction, these holes clog very quickly and water cannot exit and the bag needs to be flushed to continue - it may take 3-5 flushes to clean a 30 gallon to suck aquarium. This gravel vacuum uses multiple layers of sponge so you can use it many times without losing suction. It was easy to assemble and offers a whole range of different vacuum heads for different circumstances. The seller is very friendly and will help you solve any problem you have. I have a few criticisms but the vacuum cleaner still deserves 5 stars compared to other vacuum cleaners: - where I fear there might be too much suction power. Sucking the fish - the on/off switch on the wire is too far from the vacuum handle, making it difficult to turn off quickly in an emergency - after turning off and taking it out of the water, water is still left in The machine driving from above and below , can leave a bit of a mess - the lever can be difficult to lengthen/shorten when moving between tanks of different depths